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The Intel 8257 is a
8257/8257-5 Programmable DMA Controller
(PDF; 2,2 MB). * NEC Electronics (Europe) GmbH, 1982 Catalog, p. 665–674
. * NEC Electronics Inc. Intel chipsets Input/output integrated circuits {{comp-hardware-stub
The Intel 8257 is a direct memory access
Direct memory access (DMA) is a feature of computer systems that allows certain hardware subsystems to access main system computer memory, memory independently of the central processing unit (CPU).
Without DMA, when the CPU is using programmed i ...
(DMA) controller, a part of the MCS 85 microprocessor family. The chip is supplied in 40-pin DIP package.
See also
* Intel 8237 - DMA ControllerExternal links
* Intel8257/8257-5 Programmable DMA Controller
(PDF; 2,2 MB). * NEC Electronics (Europe) GmbH, 1982 Catalog, p. 665–674
. * NEC Electronics Inc. Intel chipsets Input/output integrated circuits {{comp-hardware-stub